Leopold caspee



(No Model.)

L. CASPER. 'OOLLAPSIBLE BOX.

No. 403,089. Patented May 14, 1889.

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LEE.

MZnewm:

UNITED STATES PATENT OFFICE.

LEOPOLD CASPER, OF BERLIN, GERMANY.

COLLAPSIBLE BOX.

SPECIFICATION forming part of Letters Patent No. 403,089, dated May 14,1889.

Application filed August 25, 1888. Serial No. 283,779. (No model.)

To all whom it may concern.-

Be it known that I, LEOPOLD CASPER, a subject of the King of Prussia,German Emperor, residing at Berlin, in the Kingdom of Prussia, Empire ofGermany, have invented certain new and useful Improvements inCollapsible Boxes, of which the following is a specification.

My invention relates to improvements in collapsible boxes; and theobject of my, improvements is to obtain a tight and resisting joining ofthe edges of the collapsible boxes. I attain this object by themechanisms illustrated in the accompanying drawings, in which Figure 1shows an upper view of a part of a collapsible box when brought into afiat state. Fig. 2 shows a perspective view of a part of a collapsiblebox provided with my improved edge-joinings. Fig. 3 shows a front Viewof a part of a joiningplate. Fig. 3 shows a horizontal section of thejoiningplate on the line to y of Fig. 3. Fig. 4 shows a horizontalsection on the line 1; w of Fig. 2.

Similar letters refer to similar parts throughout the different figures.

The collapsible box is cut and made from one piece of paper orcard-board in the wellknown manner by bending up the side walls from thebottom piece. Fig. 1 shows such a piece of fiat card-board cut out inthe wellknown manner. Fig. 2 shows the box with the side walls, 0 0,after being bent up.

Before attaching my improved edge-joinings openings n n at regulardistances are arranged in the side walls, 0 0, and after being bent uptwo neighboring side walls are joined by binding-plate a, which isprovided with two rows of double hooks, e e, stamped out of the metalplate a in the manner as illustrated in Figs. 3 and 3. parallel andopposite to each other, are arranged so as to fit and enter into theholes at n of the side walls. The hooks e 6', being inserted into theside walls of the box, are

firmly secured to the same by thin strips of metal, I) b, which closetightly the openings at n of the side walls. Thus the box is ready foruse. The thin strips of metal being removed and the joining edges beingtaken away, the box may be collapsed, as shown in Fi 1.

Iain aware that prior to my invention collapsible boxes have been madewith edgejoinings fitting into the holes of the card-box and operatingin combination with a stripof metal; but the edge-joinings haveheretofore had closed loops, which have been stamped out of the metalstrip.

In my arrangement I make use of separated 6o hooks, as before described.They can be perfectly correct bent out and in a right angle, so thatwhen the strip of metal is inserted a tight and close joining isobtained.

What I claim as my invention, and desire to secure by Letters Patent,is-

A collapsible card-box having perforated side walls, 0, and providedwithedge-joinings at, having separated hooks e 6, arranged parallel andopposite to each other, passing LEOPOLD CASPER.

Witnesses:

13. R01, THEODOR HEESE.

These hooks e e e e, lying

